Senior FullStack Engineer - Contacts

About HighLevel:
HighLevel is an AI powered, all-in-one white-label sales & marketing platform that empowers agencies, entrepreneurs, and businesses to elevate their digital presence and drive growth. We are proud to support a global and growing community of over 2 million businesses, comprised of agencies, consultants, and businesses of all sizes and industries. HighLevel empowers users with all the tools needed to capture, nurture, and close new leads into repeat customers. As of mid 2025, HighLevel processes over 4 billion API hits and handles more than 2.5 billion message events every day. Our platform manages over 470 terabytes of data distributed across five databases, operates with a network of over 250 microservices, and supports over 1 million hostnames.

Our People
With over 1,500 team members across 15+ countries, we operate in a global, remote-first environment. We are building more than software; we are building a global community rooted in creativity, collaboration, and impact. We take pride in cultivating a culture where innovation thrives, ideas are celebrated, and people come first, no matter where they call home.

Our Impact
As of mid 2025, our platform powers over 1.5 billion messages, helps generate over 200 million leads, and facilitates over 20 million conversations for the more than 2 million businesses we serve each month. Behind those numbers are real people growing their companies, connecting with customers, and making their mark - and we get to help make that happen.

About the Role:
The Contacts Team is at the heart of our CRM platform, managing the core infrastructure for contact records, views, filters, segmentation, and more. Every product surface (for example, automation, campaigns, pipelines, or reporting) interacts with Contacts. We're building scalable, reliable, and flexible systems that power millions of interactions daily.

In this role, you will drive technical outcomes as a hands-on Individual Contributor. You will own high-impact initiatives across the Contacts domain.

Responsibilities::
• Architect & Scale: Design and build highly scalable and reliable backend services using Node.js, MongoDB, and ElasticSearch, ensuring optimal indexing, sharding, and query performance
• Frontend Development: Develop and optimize user interfaces using Vue.js (or React/Angular) for an exceptional customer experience
• Event-Driven Systems: Design and implement real-time data processing pipelines using Kafka, RabbitMQ, or ActiveMQ
• Optimize Performance: Work on autoscaling, database sharding, and indexing strategies to handle millions of transactions efficiently
• Cross-Functional Collaboration: Work closely with Product Managers, Data Engineers, and DevOps teams to align on vision, execution, and business goals
• Quality & Security: Implement secure, maintainable, and scalable codebases while adhering to industry best practices
• Code Reviews & Standards: Drive high engineering standards, perform code reviews, and enforce best practices across the development team
• Ownership & Delivery: Manage timelines, oversee deployments, and ensure smooth product releases with minimal downtime
• Mentor: Guide a team of developers, ensuring best practices in software development, clean architecture, and performance optimization

Requirements::
• 4+ years of hands-on software development experience
• Strong proficiency in Node.js, Vue.js (or React/Angular), MongoDB, and Elasticsearch
• Experience in real-time data processing, message queues (Kafka, RabbitMQ, or ActiveMQ), and event-driven architectures
• Scalability expertise: Proven track record of scaling services to 200k+ MAUs and handling high-throughput systems
• Strong understanding of database sharding, indexing, and performance optimization
• Experience with distributed systems, microservices, and cloud infrastructures (AWS, GCP, or Azure)
• Proficiency in CI/CD pipelines, Git version control, and automated testing
• Strong problem-solving, analytical, and debugging skills
• Excellent communication and leadership abilities—able to guide engineers while collaborating with stakeholders

Tech Stack::
• Backend: Node.js, Nest JS, REST APIs, Redis, Firestore, Mongo, Elastic search
• Frontend: Vue 2 + Vue 3 (Composition API), Pinia, TypeScript, Vite
• Infrastructure: Docker, Kubernetes, GCP
• Accessibility & Internationalization (i18n) best practices

EEO Statement:
At HighLevel, we value diversity. In fact, we understand it makes our organisation stronger. We are committed to inclusive hiring/promotion practices that evaluate skill sets, abilities, and qualifications without regard to any characteristic unrelated to performing the job at the highest level. Our objective is to foster an environment where really talented employees from all walks of life can be their true and whole selves, cherished and welcomed for their differences while providing excellent service to our clients and learning from one another along the way! Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.

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